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Not something I've ever tried since I was a lad. Back then I constructed a box to attach at the eyepiece end of a telescope so that I could use a technique called solar projection. I used this to photograph a sequence documenting a partial eclipse of the Sun. The page Solar Observing tips by John Mcconnell FRAS contains some wise words. Pay particular attention to his advice about staring at the Sun through a telescope or telephoto lens without using specialist filters.

As far as filters are concerned, I have successfully used BAADER AstroSolar™ Safety Film for visual observing and I see no reason why it can't be adapted for photographic use but please read the technical specifications more closely than I have just done to make sure. The big trick with the Sun is to recognise that while the intensity of the light can dazzle it's actually the unseen infra-red component which can blind you (and damage equipment) and that the retina doesn't contain pain sensors, as far as I am aware.